A needle for a jet device

ABSTRACT

A needle for a jet device, includes a needle body and a tapered part arranged at the end of the needle body, in which the needle body is circumferentially provided with supporting bodies, so that when the needle is assembled in a nozzle of the jet device, the outer surfaces of the supporting bodies are coordinated with an inner chamber of the nozzle to limit the position of the needle body and form fluid channels among the supporting bodies, thereby to effectively prevent the needle from deviating from the spout of the nozzle or from radially swinging.

FIELD OF THE INVENTION

The present invention relates to the field of jet device, in particularto a needle for a jet device.

BACKGROUND OF THE INVENTION

Typically, a jet device comprises a nozzle and a needle mounted in aninner cavity of the nozzle. So far, the needle is generally with anelongated structure, the head of the needle is needle-like, and theneedle is movable in the axial direction of the nozzle when an externalforce acts on, thereby adjusting the cross-section for water flow formedby the needle and the nozzle to regulate and control the nozzle jetflow. This type of jet device is widely used in hot water system forhouseholds, hotels and the hotel.

An example of a water mixing valve is disclosed in Chinese patentliterature under No. 102086941B, the mixing valve includes a valve bodyprovided with a cold water inlet on the valve body, the cold water inletvalve is in communication with a nozzle, said nozzle is provided with aneedle valve for assisting the adjustment of cold water flow, and thecross-section area of water outlet of the nozzle is adjustable byscrewing the needle valve in or out.

A further example of an adjustable jet device with multiple watersources is disclosed in Chinese patent literature under No. 102767210A,the jet device includes a jet body, a fluid working cavity and a needle,the fluid working cavity is disposed in the jet body, the front end ofthe fluid working cavity is provided with a nozzle, a needle is disposedon the extension line of the center line of the fluid working cavity,the end of the needle is provided with a needle stroke control means,wherein the needle can be moved in the axial direction of the nozzleunder the control of the needle stroke control means to adjust thejetting flow of nozzle.

In practice, in order to reduce production costs for companies, theconventional needle (needle valve) for a hot water system is providedwith an elongated structure, which is the same as that illustratedrespectively in the drawings of above two patent literatures. However,after research, it is found that there are some defects for suchelongated needle in practical use, i.e. the pressure put on theelongated needle in its radial direction is small when the pressure ofthe fluid flowing through the nozzle is small, which can meet theoperation requirements. However, when the pressure of the fluid flowingthrough the nozzle is large or even very large and the fluid flow rateis instable, a larger and uniform pressure will occur and be put on theneedle in its radial direction, i.e., in the elongation direction of theneedle, then the different portions will have different radial pressureput thereon, which may cause a deviation of the water outlet of theneedle, or cause a radial wobbling of the needle, thereby affecting thejetting effect of the nozzle.

If the needle with larger diameter is designed in order to solve theabove problems, it will inevitably lead to an increase with weight ofentire jet device and also the production costs correspondingly.

SUMMARY OF THE INVENTION

The technical problem to be solved by the invention is that the needleof conventional jet device is apt to wobble or deviate with the wateroutlet of nozzle under the action of the fluid, therefore, it is oneobjective of the invention to provide a needle for a jet device whichhas simple structure, easy installation, stable operation underdifferent fluid pressures and flow rates.

To achieve the above objective, in accordance with one embodiment of theinvention, there is provided a needle for a jet device, comprising aneedle body, and a conical portion disposed on one end of the needlebody, the needle body is circumferentially provided with a supportingmember, and an outer surface of the supporting member coordinates withan inner cavity of a nozzle, in order to limit the position of theneedle body and to form a fluid passage at the supporting member, as theneedle is disposed inside the nozzle of a jet device.

In a class of this embodiment, the supporting member comprises aplurality of ribs uniformly and circumferentially arranged around theneedle body and extending in the axial direction of the needle body, andeach two the ribs have one the fluid passage formed therebetween.

In a class of this embodiment, the rib comprises a first rib part and asecond rib port; and the first rib part is arranged towards the coldwater inlet of the nozzle, and has a radial dimension smaller than thatof the second rib part, so as to coordinate with the inner wall of thenozzle to form the fluid passage, and a coordination is formed betweenan outer surface of the second rib part and the inner cavity of thenozzle.

In a class of this embodiment, the inner chamber wall of the nozzle isformed a slotting corresponding to the second rib portion, the secondrib portion can coordinate into the slotting, and can slide along withthe axial direction of the nozzle.

In a class of this embodiment, the inner wall of the nozzle has a grooveformed thereon, which corresponds to the second rib part, and the secondrib part is adapted for being fitted in the groove and sliding in theaxial direction of the nozzle.

In a class of this embodiment, the number of the ribs is three, four,five or six.

In a class of this embodiment, the supporting body is an annularsupporting plate disposed on the needle body, a plurality of diversionoutlets is formed on the board of the annular supporting plate as thefluid passages.

In a class of this embodiment, the supporting member is a circular ring,the circular ring is connected with the needle body through a pluralityof rib strips, and each two rib strips have one the fluid passage formedtherebetween.

In a class of this embodiment, the supporting member of the needle bodyand the conical portion have a water pressurizing and mixing segmentformed therebetween, and the water pressurizing and mixing segment iscylindrical in shape.

In a class of this embodiment, the diameter of the water pressurizingand mixing segment is larger than, or equal to, or slightly smaller thanthe diameter of a water outlet of the nozzle.

In a class of this embodiment, the diameter of the conical portion islarger at a root thereof and smaller at a front end thereof, and theconical degree of the conical portion is 10°-150°, and the length of theconical portion is smaller than or equal to the length for which thenozzle is movable.

In a class of this embodiment, the diameter of the conical portion isgradually reduced in a linear manner from the root to the front end.

Advantages of the above technical solution of the present invention,compared to prior art, are summarized as follows:

The needle for a jet device of the present invention, wherein, theneedle body is circumferentially provided with a supporting member, andan outer surface of the supporting member coordinates with an innercavity of the nozzle, in order to limit the position of the needle bodyand to form a fluid passage on the supporting member, as the needle isdisposed inside the nozzle of a jet device, so that when the pressure ofthe fluid flowing through the nozzle is large or even very large and thefluid flow rate is instable, it may effectively prevent the needle fromdeviating from the water outlet of the nozzle, or a radical wobbling ofthe needle, affecting the jetting effect of the nozzle, due to a largerand non-uniform pressure occur and be put on the needle in its radialdirection of the nozzle.

The needle for a jet device of the present invention, wherein, thesupporting body comprises a plurality of ribs, which surround the needlebody and are uniformly distributed in the circumferential direction, andextend in the axial direction of the needle body, the ribs form thefluid passages between each other, thereby facilitating the flow offluid, further, each rib comprises the first rib part and the second ribpart, and the radical dimension of the first rib part is smaller thanthe second rib part, so it is possible to further enhance the jettingeffect of the nozzle.

The needle for a jet device of the present invention, wherein, thesupporting member of the needle body and the conical portion have awater pressurizing and mixing segment formed therebetween, and the waterpressurizing and mixing segment is cylindrical in shape, allows thewater introduced to the fluid flow passages to be uniformly mixed andpressurizing effect to be achieved, so as to ensure the final jettingeffect of the nozzle.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the present invention clearly understood more easily,detailed description is further presented below, in conjunction withaccompany drawings, wherein,

FIG. 1 is a schematic view of three-dimensional structure of the needleof one embodiment of the present invention;

FIG. 2 is a schematic view of one part of the structure showing thecoordination between the needle with the nozzle;

FIG. 3 is a schematic view of a supporting member structure of thedetailed description of the embodiments of the present invention;

FIG. 4 is a schematic view of a further supporting member structure ofthe detailed description of the embodiments of the present invention.

BRIEF DESCRIPTION OF THE MAKING NUMBERS IN THE ACCOMPANYING DRAWINGS

1—needle body, 1 a—water pressurizing and mixing segment, 2—conicalportion, 2 a—root, 2 b—front end, 3—fluid passage, 4—rib, 41—first ribpart, 42—second rib part, 5—annular supporting board, 6—diversion hole,7—circular ring, 8—rib strip, 10—water outlet.

DETAILED DESCRIPTION OF THE EMBODIMENTS

As shown in FIGS. 1 and 2, the needle provided by this embodiment of thepresent invention, comprises a needle body 1, and a conical portion 2disposed on one end of the needle body 1, wherein, an outer surface ofthe needle body 1 is circumferentially provided with a supportingmember, such that when the needle is assembled to the nozzle 9 of a jetdevice, an outer surface of the supporting member can coordinate orcontact with the inner cavity of the nozzle 9, in order to limit theposition of the needle body 1, and accordingly form a fluid passage 3for fluid flowing at the supporting member.

The needle with such structure used in practice, even when the pressureof fluid flowing through the nozzle 9 is large or even very large andthe fluid flow rate is instable, i.e., in the elongation direction ofthe needle, even the different portions will have different radialpressure put thereon, on the premise that the smooth flow of the fluidshould not be affected, due to a larger and non-uniform pressure willoccur and put on the needle in its radial direction, it can alsoeffectively prevent the needle from deviating from the water outlet ofthe nozzle 9, or causing a radial wobbling of the needle, therebyavoiding affecting the jetting effect of the water outlet 10 of thenozzle 9.

According to the role and function of the supporting member as describedabove, in the actual structures, detailed description on the supportingmember is further presented below, but it is to be understood thon thesupporting member is not to be limited to the following structures,numerous variations, substitutions and modification be took by thoseskilled in the art.

The first embodiment of the structure of the supporting member:

In this embodiment, the supporting member comprises a plurality of ribs4 circumferentially and uniformly arranged around the needle, and eachtwo ribs have one the fluid passage 3 formed therebetween, as shown inFIG. 1. thus, after the needle is assembled to the nozzle, the ribs 4can coordinate with the inner cavity of the nozzle in contact manner tolimit the position of the needle body.

In the actual processing, the rib 4 can be formed by the way ofmachining such as cutting, can also be one-step molded with the needlebody by the way of casting or injection molding etc, appropriate moldingmethod can be selected according to actual needs.

Further, in order to enhance the jetting effect of the nozzle, the ribs4 comprises a first rib part 41 and a second rib part 42, wherein, afterthe ribs coordinate with the nozzle, the first rib part 41 is arrangedtowards the cold water inlet of the nozzle, and has a radial dimensionsmaller than that of the second rib part 42, so as to coordinate withthe inner wall of the nozzle to form the fluid passages 3, so as touniformly guide the water from the inlet of the nozzle into the fluidpassages 3 of the needle, a coordination is formed between an outersurface of the second rib part 42 and the inner cavity of the nozzle 9,so as to ensure the position for the needle can be limited by thesupporting member through improving the structure of the rib 4, at thesame time, and enhance the jetting effect of the nozzle 9.

The length of the first rib part 41 depends on the axial dimension ofwater inlet of the nozzle, is usually equal to a sum of the length ofwater inlet of the nozzle in the axial direction and the length forwhich the nozzle is movable.

It should be noted that, the first rib part 41 may be a cylinder, but inorder to enhance the strength of the needle body 1, preferably, the rib4 comprises the first rib part 41.

Furthermore, the external diameter of the second rib part 42 depends onthe cross-section area of the entire fluid passages 3, which is largerthan the jetting cross-section area after the coordination between thenozzle and the needle, so as to ensure minimization of the loss of waterpressure of the nozzle outlet.

At this time, the needle both can move back and forth in the axialdirection of the nozzle and can rotate in the nozzle by the supportingmember providing a limitation to the position.

In practice, the inner cavity wall of the nozzle 9 has a groove formedthereon, which corresponds to the second rib part 42, the grooveextending in the axial direction of the nozzle 9, and the second ribpart 42 is adapted for being fitted in the groove and sliding in theaxial direction of the nozzle. In this structure, the groove is able toguide the needle and prevent the same for rotating, i.e. the needle onlycan move in the axial direction of the nozzle back and forth, and cannotrotate in the nozzle.

In order to facilitate manufacturing work and ensure that no loss ofwater pressure is incurred before the cold water reaches the nozzleoutlet, the number of the ribs 4 is preferably three, four, five or six,thereby ensuring the sum of the cross-section areas of fluid passages 3formed by the ribs therebetween is larger than the jetting cross-sectionarea of the nozzle, to ensure no loss of water pressure is incurred or aslight loss of water pressure is incurred before the cold water reachesthe nozzle outlet. However, the number of the ribs 4 is not limited tothis, may be two or more.

The second embodiment of the structure of the supporting member:

In this embodiment, as shown in FIG. 4, the supporting member is anannular supporting board 5 disposed on the needle body 1, a plurality ofdiversion holes 6 are formed on the annular supporting board 5 as thefluid passages.

The annular supporting board 5 has appropriate thickness according toactual needs, furthermore, the shape of the diversion holes 6 is notlimited to round hole as shown in FIG. 4, may be scallop hole,meanwhile, the diversion holes 6 should be formed by incurring noinfluence or slight influence on the flow rate of fluid, for example, anarc is provided at the connection point between the diversion holes 6and the annular supporting board 5 in favor of the fluid flowing.

The third embodiment of the structure of the supporting member:

In this embodiment, as shown in FIG. 3, the supporting member is acircular ring 7, the circular ring 7 is connected with the needle body 1through a plurality of rib strips 8, and each two rib strips 8 have onefluid passage 3 formed therebetween.

The shapes of the circular ring 7 and the rib strips 8 are in favor ofthe fluid flowing smoothly to have a slight influence or no influence onfluid flowing.

The description of three structural types of the supporting member ispresented above, but it is not limited hereto.

Furthermore, as shown in FIG. 1, after the needle coordinates with thenozzle, and when the conical portion of the needle completely coordinatewith the water outlet, in order to avoid the interference between thesupporting member and the conical surface of the inner cavity at thewater outlet, preferably, the supporting member of the needle body 1 andthe conical portion 2 of the needle body 1 have a water pressurizing andmixing segment 1 a formed therebetween, and the water pressurizing andmixing segment 1 a is cylindrical in shape, so as to form a space forthe cold water inflowing between the water pressurizing and mixingsegment 1 a of the needle and the inner cavity wall of the nozzle afterthe needle is assembled to the nozzle, as shown in FIG. 2, which mayensure the incoming fluid through the fluid passages is uniformly mixedbefore it get into the conical surface formed by the conical portion 2and the water outlet 10 and pressurizing effect can be achieved, so asto ensure the final jetting effect of the nozzle.

As shown in FIG. 2, when the needle 9 is moved toward the water outlet10 in the axial direction of the nozzle 10, the conical portion 2 of theneedle gradually coordinates with the water outlet 10, therefore, afterthe conical portion 2 is completely coordinates with the water outlet10, in order to prevent further cold water from spurting from the wateroutlet 10, preferably, the diameter of the water pressurizing and mixingsegment 1 a is larger than, or equal to, or slightly smaller than thediameter of a water outlet (10) of the nozzle.

“Larger than, equal to” here, means the water outlet 10 is sealed by thewater pressurizing and mixing segment 1 a, after conical portion 2completely coordinates with the water outlet 10, so as to prevent thecold water from spurting from the water outlet 10.

“Slightly smaller than” here, means there is a very slight differencebetween the diameter of the water pressurizing and mixing segment 1 aand the diameter of the water outlet 10, i.e., after the conical portion2 coordinates with the water outlet 10, a slight gap is provided betweenouter circumferential surface of the water pressurizing and mixingsegment 1 a and inner circumferential surface of the water outlet 10,although a little cold water may be spurted from the water outlet 10through the gap, the slight effect on the hot water flowing through theouter wall of the nozzle 9 can be ignored.

The length of the water pressurizing and mixing segment 1 a should notbe too short, otherwise it may cause the water from the nozzle to thebifurcation, i.e., the length of the water pressurizing and mixingsegment 1 a is relate to the cross-section of the fluid passage, thecross-section of the nozzle outlet and the thickness of the supportingmember, but this impact will not be significant.

Furthermore, as shown in FIG. 1, the diameter of the conical portion 2is larger at a root 2 a thereof and smaller at a front end 2 b thereof,and the conical degree of the conical portion 2 is 10°-150°, the conicaldegree comprises 10° and 150°, after the needle is assembled to thenozzle, the length of the conical portion 2 is smaller than or equal tothe length for which the nozzle is movable, so that appropriatecoordination between the water outlet 10 and the conical portion 2 canbe achieved.

In addition, the diameter of the conical portion 2 is gradually reducedin a linear manner from the root 2 a to the front end 2 b, i.e. theconical portion is a cone in structure. For the fluid flowing smoothly,as shown in FIG. 2, the coordination between the conical portion 2 andthe water outlet may be linear. The conical portion 2 may be of anon-linear or parabolic surface, so as to make some appropriateadjustments automatically in accordance with different flow rates offluid.

Obviously, the aforementioned embodiments are merely intended forclearly describing the examples, rather than limiting the implementationscope of the invention. For those skilled in the art, various changesand modifications in other different forms can be made on basis of theaforementioned description. It is unnecessary to describe all theimplementation ways herein. However, any obvious changes ormodifications derived from the aforementioned description are intendedto be embraced within the scope of protection of the present invention.

1. A needle for a jet device, comprising a needle body, and a conicalportion disposed on one end of said needle body, wherein said needlebody is circumferentially provided with a supporting member, and anouter surface of said supporting member coordinates with an inner cavityof a nozzle, in order to limit the position of said needle body and toform a fluid passage on said supporting member, as said needle isdisposed inside said nozzle of a jet device.
 2. The needle of claim 1,wherein said supporting member comprises a plurality of ribs uniformlyand circumferentially arranged around said needle body and extending inthe axial direction of said needle body, and each two said ribs have onesaid fluid passage formed therebetween.
 3. The needle of claim 2,wherein said rib comprises a first rib part and a second rib part; andsaid first rib part is arranged towards said cold water inlet of saidnozzle, and has a radial dimension smaller than that of said second ribpart, so as to coordinate with said inner wall of said nozzle to formsaid fluid passage, and a coordination is formed between an outersurface of said second rib part and said inner cavity of said nozzle. 4.The needle of claim 3, wherein said inner wall of said nozzle has agroove formed thereon, which corresponds to said second rib part, andsaid second rib part is adapted for being fitted in said groove andsliding in the axial direction of said nozzle.
 5. The needle of claim 2,wherein the number of said ribs is three, four, five or six.
 6. Theneedle of claim 1, wherein said supporting member is an annularsupporting board disposed on said needle body, a plurality of diversionholes are formed on said annular supporting board as said fluidpassages.
 7. The needle of claim 1, wherein said supporting member is acircular ring, said circular ring is connected with said needle bodythrough a plurality of rib strips, and each two rib strips have one saidfluid passage formed therebetween.
 8. The needle of claim 1, whereinsaid supporting member of said needle body and said conical portion havea water pressurizing and mixing segment formed therebetween, and saidwater pressurizing and mixing segment is cylindrical in shape.
 9. Theneedle of claim 8, wherein the diameter of said water pressurizing andmixing segment is larger than, or equal to, or slightly smaller than thediameter of a water outlet of said nozzle.
 10. The needle of claim 1,wherein the diameter of said conical portion is larger at a root thereofand smaller at a front end thereof, and the conical degree of saidconical portion is 10°-150°, and the length of said conical portion issmaller than or equal to the length for which said nozzle is movable.11. The needle of claim 10, wherein the diameter of said conical portionis gradually reduced in a linear manner from said root to said frontend.
 12. The needle of claim 3, wherein the number of said ribs isthree, four, five or six.
 13. The needle of claim 4, wherein the numberof said ribs is three, four, five or six.
 14. The needle of claim 6,wherein said supporting member of said needle body and said conicalportion have a water pressurizing and mixing segment formedtherebetween, and said water pressurizing and mixing segment iscylindrical in shape.
 15. The needle of claim 7, wherein said supportingmember of said needle body and said conical portion have a waterpressurizing and mixing segment formed therebetween, and said waterpressurizing and mixing segment is cylindrical in shape.
 16. The needleof claim 14, wherein the diameter of said water pressurizing and mixingsegment is larger than, or equal to, or slightly smaller than thediameter of a water outlet of said nozzle.
 17. The needle of claim 15,wherein the diameter of said water pressurizing and mixing segment islarger than, or equal to, or slightly smaller than the diameter of awater outlet of said nozzle.